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Add cpu / mem / fsz limits to build system

Browse source 
Thanks to all the refactorings we now have the ability to enforce
reasonable limitations on the amount of resources any individual
compile or test can consume. Those limits are currently:

- `-C 8` seconds of 3.1ghz CPU time
- `-M 256mebibytes` of virtual memory
- `-F 100megabyte` limit on file size

Only one file currently needs to exceed these limits:

    o/$(MODE)/third_party/python/Objects/unicodeobject.o: \
        QUOTA += -C16  # overrides cpu limit to 16 seconds

This change introduces a new sizetol() function to LIBC_FMT for parsing
byte or bit size strings with Si unit suffixes. Functions like atoi()
have been rewritten too.
This commit is contained in:
Justine Tunney 2021-08-13 11:18:25 -07:00
parent 9b29358511
commit e963d9c8e3
49 changed files with 1802 additions and 553 deletions
Download patch file Download diff file Expand all files Collapse all files

94
tool/build/runit.c
View file

@ -325,67 +325,55 @@ void SendRequest(void) {
CHECK_NE(-1, close(fd));
}
bool Recv(unsigned char *p, size_t n) {
size_t i, rc;
static long backoff;
for (i = 0; i < n; i += rc) {
do {
rc = mbedtls_ssl_read(&ezssl, p + i, n - i);
} while (rc == MBEDTLS_ERR_SSL_WANT_READ);
if (!rc || rc == MBEDTLS_ERR_NET_CONN_RESET) {
usleep((backoff = (backoff + 1000) * 2));
return false;
} else if (rc < 0) {
EzTlsDie("read response failed", rc);
}
}
return true;
}
int ReadResponse(void) {
int res;
ssize_t rc;
size_t n, m;
uint32_t size;
unsigned char *p;
enum RunitCommand cmd;
static long backoff;
static unsigned char msg[512];
res = -1;
for (;;) {
while ((rc = mbedtls_ssl_read(&ezssl, msg, sizeof(msg))) < 0) {
if (rc == MBEDTLS_ERR_SSL_WANT_READ) {
continue;
} else if (rc == MBEDTLS_ERR_NET_CONN_RESET) {
CHECK_EQ(ECONNRESET, errno);
usleep((backoff = (backoff + 1000) * 2));
close(g_sock);
return -1;
} else {
EzTlsDie("read response failed", rc);
}
unsigned char b[512];
for (res = -1; res == -1;) {
if (!Recv(b, 5)) break;
CHECK_EQ(RUNITD_MAGIC, READ32BE(b));
switch (b[4]) {
case kRunitExit:
if (!Recv(b, 1)) break;
if ((res = *b)) {
WARNF("%s on %s exited with %d", g_prog, g_hostname, res);
}
break;
case kRunitStderr:
if (!Recv(b, 4)) break;
size = READ32BE(b);
for (; size; size -= n) {
n = MIN(size, sizeof(b));
if (!Recv(b, n)) goto drop;
CHECK_EQ(n, write(2, b, n));
}
break;
default:
fprintf(stderr, "error: received invalid runit command\n");
_exit(1);
}
p = &msg[0];
n = (size_t)rc;
if (!n) break;
do {
CHECK_GE(n, 4 + 1);
CHECK_EQ(RUNITD_MAGIC, READ32BE(p));
p += 4, n -= 4;
cmd = *p++, n--;
switch (cmd) {
case kRunitExit:
CHECK_GE(n, 1);
if ((res = *p & 0xff)) {
WARNF("%s on %s exited with %d", g_prog, g_hostname, res);
}
goto drop;
case kRunitStderr:
CHECK_GE(n, 4);
size = READ32BE(p), p += 4, n -= 4;
while (size) {
if (n) {
CHECK_NE(-1, (rc = write(STDERR_FILENO, p, MIN(n, size))));
CHECK_NE(0, (m = (size_t)rc));
p += m, n -= m, size -= m;
} else {
CHECK_NE(-1, (rc = recv(g_sock, msg, sizeof(msg), 0)));
p = &msg[0];
n = (size_t)rc;
if (!n) goto drop;
}
}
break;
default:
__die();
}
} while (n);
}
drop:
CHECK_NE(-1, close(g_sock));
close(g_sock);
return res;
}